Thermodynamic modelling and energy balance of direct methanation of glycerol for Bio-SNG production
چکیده مقاله :
Glycerol can be considered a waste product when the cost of processing is higher than the processed glycerol
value. In these situations, conversion of glycerol to an energy vector may be more beneficial. The aim of this
work was to design and assess the feasibility of a process for low temperature steam reforming of glycerol (GLTSR). GLT-SR is a novel form of direct methanation that produces a CH4 rich, renewable fuel gas (Bio-SNG) that
could substitute the current natural gas consumption associated with biodiesel production.
In this work, thermodynamic modelling to determine the conditions that suited CH4 production and minimised carbon below 600 K as well as the impact of molar steam to carbon ratio (S/C) and pressure on the
biomass to fuel efficiency of a GLT-SR plant were carried out using Aspen Plus® (V8.8) chemical processing
software. Operating at 8 atm provided the benefits of high conversion to CH4 whilst minimising the outlet
reformer temperature and achieving the required inlet temperature for catalyst operation.
The Bio-SNG produced had an LHV of 16.7 MJ kg−1 and had properties like landfill gas and biogas. An energy
balance of the process determined that the electricity demand was negligible due to the low energy use of pumps
and fans without the need for compressors. Operating at 8 atm, the production of Bio-SNG in the GLT-SR plant
has the potential to offset 30% of the natural gas embodied energy requirement or 8.9% of the total embodied
energy requirement for soybean biodiesel production from farm to use.
توضیحات تکمیلی :
مقاله ISI انگلیسی اصلی
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تعداد صفحات فایل ISI انگلیسی اصلی: 10 صفحه